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Bart Louwers

PROFILE

Bart Louwers

Bart contributed to the maplibre-native repository by engineering cross-platform mobile SDK releases and modernizing build systems for Android, iOS, Linux, and macOS. He implemented automated CI/CD pipelines using CMake and GitHub Actions, improving release reliability and developer efficiency. Bart addressed memory safety and lifecycle issues in C++ code, enhanced artifact packaging, and introduced features such as Vulkan rendering and PMTiles support. He maintained release hygiene through changelog management and documentation updates, and optimized performance with Rust-based utilities and sccache integration. His work demonstrated depth in build automation, dependency management, and cross-platform development, resulting in more stable, maintainable SDKs.

Overall Statistics

Feature vs Bugs

73%Features

Repository Contributions

212Total
Bugs
31
Commits
212
Features
85
Lines of code
78,305
Activity Months13

Work History

October 2025

17 Commits • 7 Features

Oct 1, 2025

October 2025 performance and stability sprint across MapLibre ecosystems. Key outcomes include rendering optimizations that cut homepage image load times, a strategic native roadmap expansion, major Android SDK updates (min SDK 23, 12.x releases), build system and CI hardening, and iOS platform stability fixes. These efforts enhanced end-user performance, developer experience, and cross-platform reliability, enabling faster feature delivery and more robust SDKs.

September 2025

22 Commits • 9 Features

Sep 1, 2025

September 2025 performance summary focusing on release engineering, cross-platform packaging, CI stability, and code quality improvements. Delivered major mobile release updates (Android 11.13.2 and iOS 6.19.x), implemented macOS amalgamation packaging for core releases to streamline cross-OS distributions, and hardened CI/build pipelines for faster feedback. Key items include: - Android 11.13.2 release shipped with version updates and bug fixes; weak pointer handling and sprite call bugs addressed. Commit 6710264e0c59079f86447e381a0853fdd19c9045 - iOS Release 6.19.x updates with 6.19.0/6.19.1 workstreams and draft-release workflow adjustments. Commits 249e77c7fafc4dbb8e80699bf7254ebe94969bdb and 822a18c81c9a866055e74689127f4df216fbdf37 - macOS amalgamation packaging for core releases, plus CI/script updates to generate and upload standard and amalgamated libraries across macOS/Linux/Windows. Commit 9b6325a14e2cf1cc29ab28c1855ad376f1ba4903 - CI infrastructure stability and performance improvements: disable Windows trigger, add swap storage, remove fetch-depth, improve Linux CI checkout/PR numbering, and default draft releases workflow. Commits 5ba738f30c51cb8536ae684365bc4336b7e54aa5; dfbb0de2a9986eac2c6026f1795ed2c115339de4; 914673a4b29d2033e349bb97a71eb618a92cc843; 6f981b0361564c412f86c50d56574e6a87294f49; 985b41b426f095159471cc04f04b24db4adf843e - Code quality and build system enhancements: clang-tidy linting, Bazel dependency management, Sentry instrumentation, and top-level vendor directory for dependencies. Commits ed1f4b3269a95c9eb7cdb50a8115dcd68e6543ea; 5af61373b5baf37bbab4ff0da4ddece9ee635c7c; 60ac709e95ec67925fe4dfcecd4f0d18e4e4e7cf; bb42ed111bbbdfaa054479d266ae25ee61a34267

August 2025

18 Commits • 3 Features

Aug 1, 2025

MapLibre Native – August 2025: Key platform improvements and stability wins across Linux builds, cross-platform releases, and CI/CD. Key features delivered: - Linux Build System Modernization and Vulkan Support: Consolidated Linux amalgamation with static libraries, standardized CMake presets, added OpenGL/Rust variant support in CI, and expanded publicly exposed headers for core build dependencies. - CI/CD Pipeline Optimizations and Tooling Updates: Enhanced fork protections, free runners for Node.js builds, sccache/ctcache integration, macOS version pinning updates, and general CI improvements. - Documentation: MapLibre Compose with Compose Multiplatform: Documentation updated to describe integration across supported platforms. Major bugs fixed: - Core Memory Safety and String Handling Fixes: Addresses memory safety/UB in TaggedString, strengthens weak pointer management in RasterSource and derived classes, and related release hygiene. - Android and iOS Release Bug Fixes: Stability and correctness fixes for Android and iOS SDK releases (Android 11.13.1; iOS release 6.18.1). Overall impact and accomplishments: - More reliable and scalable Linux builds with broader dependency exposure, leading to easier maintenance and faster iteration. - Stronger cross-platform stability for mobile SDKs and improved release hygiene, reducing post-release hotfixes. - Accelerated development workflow with streamlined CI/CD, leading to faster and more predictable deployments. Technologies/skills demonstrated: - CMake, Linux tooling, and static library amalgamation; OpenGL/Rust variant support in CI. - Memory safety practices, safe pointer management, and release hygiene. - CI/CD tooling (fork protections, free runners, sccache/ctcache), macOS pinning, and Compose Multiplatform documentation.

July 2025

28 Commits • 9 Features

Jul 1, 2025

July 2025 (2025-07) focused on delivering end-to-end release automation, stabilizing CI/CD pipelines, and documenting feature milestones across MapLibre Native and MapLibre Hub. The team automated publishing and release workflows, shipped key platform updates, and improved build reliability—driving faster go-to-market and higher release quality.

June 2025

13 Commits • 5 Features

Jun 1, 2025

June 2025 performance summary for maplibre-native focused on delivering high-value features, stabilizing core Android/iOS/macOS subsystems, and accelerating release cycles to strengthen business continuity and platform reliability.

May 2025

19 Commits • 3 Features

May 1, 2025

May 2025 monthly summary for maplibre-native: Delivered cross-platform release automation and stability improvements, expanded CI/CD coverage, and hardened release workflows driving faster, more reliable Android/iOS distributions with better testing and versioning; significantly improved render-thread stability on Android.

April 2025

23 Commits • 14 Features

Apr 1, 2025

April 2025 performance summary for MapLibre development: Delivered major platform releases, stabilized CI/CD, reduced crash vectors, and improved developer experience across native and hub repos. These efforts improved release velocity, product reliability, and cross‑platform support, driving business value for customers and internal teams.

March 2025

8 Commits • 3 Features

Mar 1, 2025

March 2025: Focused on delivering cross-platform MapLibre Native enhancements, stabilizing memory usage, and hardening release processes. Key features shipped across iOS and Android, with improved internal tooling to accelerate future releases and reduce maintenance toil. This month’s work reduces time-to-market for new features and enhances developer experience through clearer documentation and robust release automation.

February 2025

13 Commits • 7 Features

Feb 1, 2025

February 2025 performance summary focused on delivering high-value releases, establishing robust release processes, and improving build stability across maplibre-native and maplibrehub.io.git. Key outcomes include delivering a feature-rich iOS release, preparing Android releases for two upcoming versions, and standardizing release documentation and build processes to accelerate time-to-market while reducing build friction. The work spanned major platform features, CI/CD automation, and repository hygiene, with a clear focus on business value such as faster, more reliable releases and improved developer productivity.

January 2025

15 Commits • 8 Features

Jan 1, 2025

January 2025 performance highlights: Delivered branding assets on About page, PMTiles-enabled platform releases for iOS and Android, experimental Rust-based CSS color parsing with benchmarks, Metal custom style layers API, build system modernization and documentation overhaul, and CI/CD improvements. These efforts improve branding consistency, rendering capabilities, performance, and developer efficiency, accelerating time-to-market and user value.

December 2024

13 Commits • 9 Features

Dec 1, 2024

Summary for 2024-12: Delivered multi-repo Vulkan-enabled Android capabilities, enhanced CI reliability, expanded platform SDKs, and improved documentation and branding. Key outcomes include: multi-repo features delivered (Android Vulkan packaging, newsletter/content updates, iOS release), CI stability improvements and build system upgrades, and documentation enhancements for SQLite session handling and conflict resolution.

November 2024

20 Commits • 6 Features

Nov 1, 2024

November 2024 focused on release readiness, CI/QA automation, and developer experience improvements across Android and iOS SDKs, with targeted cross-repo documentation refinements. Key outcomes include a robust Android CI/Build and Benchmark Infrastructure, stability fixes for AWS Device Farm instrumentation tests, and formal release preparation for MapLibre Android SDK 11.6.x. Cross-repo docs/workflow improvements and developer tooling updates accelerated iteration cycles and improved reliability for both internal developers and external users.

October 2024

3 Commits • 2 Features

Oct 1, 2024

October 2024: Substantial code-quality improvements and expanded test coverage in the maplibre-native stack, paired with a comprehensive iOS release (MapLibre iOS SDK 6.8.0). These efforts reduce risk, improve stability, and enable faster, more predictable cross-platform delivery.

Activity

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Quality Metrics

Correctness90.6%
Maintainability90.2%
Architecture87.8%
Performance81.8%
AI Usage20.2%

Skills & Technologies

Programming Languages

AstroBashBatchBazelCC++CMakeCSSDockerfileGLSL

Technical Skills

API IntegrationAPI InteractionAWSAWS CLIAWS Device FarmAWS S3Android DevelopmentAndroid TestingAstroAutomated TestingAutomationBazelBug FixingBuild AutomationBuild Configuration

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

maplibre/maplibre-native

Oct 2024 Oct 2025
13 Months active

Languages Used

C++MarkdownBashBatchBazelDockerfileGradleHTML

Technical Skills

C++Code QualityRelease ManagementSoftware DevelopmentStatic AnalysisTesting

maplibre/maplibrehub.io.git

Nov 2024 Oct 2025
8 Months active

Languages Used

HTMLMarkdownCSSAstroMDXTypeScriptJavaScript

Technical Skills

DocumentationWebsite Content ManagementContent ManagementTechnical WritingFront End DevelopmentWeb Development

nodejs/node

Nov 2024 Sep 2025
3 Months active

Languages Used

MarkdownC++JavaScript

Technical Skills

documentationtechnical writingC++ developmentJavaScriptJavaScript developmentdatabase management

vanniktech/gradle-maven-publish-plugin

Oct 2025 Oct 2025
1 Month active

Languages Used

YAML

Technical Skills

ConfigurationDocumentation

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